## Gel Strength Measurement Procedures

1. Stir a sample at 600 RPM for about 15 seconds.
2. Turn the RPM knob to the STOP position.
3. Wait the desired rest time (normally 10 seconds or 10 minutes).
4. Switch the RPM knob to the GEL position.
5. Record the maximum deflection of the dial before the Gel breaks, as the Gel strength in lb/100 ft2.
• lb/100 ft2 x 5.077 = Gel strength in dynes/cm2).
• C) YIELD POINT: Theory

This is the measure of the electro-chemical or attractive forces in the mud under flow (dynamic) conditions. These forces depend on (1) surface properties of the mud solids, (2) volume concentrations of the solids and (3) electrical environment of the solids. The yield point of the mud reflects its ability to carry drilled cuttings out of the hole.

Measurement:

YP = 300 RPM - Plastic Viscosity

### Experimental Procedure

1. Obtain a recently agitated mud sample from each of mud tanks (1) and (2).
2. Using the Baroid Rheometer, obtain dial readings at 3, 300 and 600 RPM.
3. By means of the rheological calculations procedure, determine the Apparent and Plastic Viscosities, Yield Point and initial 10 sec. and final 10-minute Gel Strength parameters.
4. Tabulate your results as in the given table below:
 Sample No. VISCOSITY CP Gel strength lb/100 ft2 0600 0300 ^p M-a Yp lb/100 ft2 Initial 10 sec. Gel Final 10 min. Gel

### 1. (a) What is Plastic Viscosity?

• b) What does it characterize?
• c) What is the difference between the Plastic Viscosity and Apparent Viscosity of a drilling fluid?
1. Which role does Gel Strength play in the drilling process?
2. What type of fluids does drilling fluid belong to?
3. (a) What is the Yield Point?
• b) What does it characterize?
• c) What is the difference between Gel Strength and Yield Point of a drilling mud?

5. Explain what you know about one point and two points curve fluids? Give one example of each type of fluid.

+16 -10

### Responses

• pippin
How to carry out experimental test of density viscosity and gel strength of drilliing muds.?
9 years ago
• bildat
Which role does Gel Strength play in the drilling process?
9 years ago
• christine
Which role does gel strenght play in the drilling process?
9 years ago
• segan
What does your gel strength mean in drilling fluids?
9 years ago
• fabrizia
What are the different gelatin strengths?
8 years ago
• Zufan
What are the function of 10 second gel and 10 minute gel?
8 years ago
• Jennifer
What does plastic viscosity characterize?
8 years ago
• Kayden Burns
How is gel strenth measured?
7 years ago
• Julia
How to measure gel strength?
7 years ago
• amedeo esposito
How to check gel strength?
7 years ago
• Sesuna
What type of fluids does drilling fluid belong to?
6 years ago
• matilda
What is gel strength measurement unit?
6 years ago
• Henry
What is measured with gel strength?
6 years ago
• Elanor
How to calculate gel strength of drilling mud formula?
4 years ago
• neftalem robel
What does yieldd point characterizesin drilling?
4 years ago
• Robel
What is the difference between yield point and gel strenght?
4 years ago
• Anita
What is gel strenght in relation to viscosity?
3 years ago
• Arthur
What are the processes of measuring gel strength well logging?
3 years ago
• fesahaye nebay
What is the difference between the Plastic Viscosity and Apparent Viscosity of a drilling fluid?
3 years ago
• Crystal
What does plastic viscosity characterise?
3 years ago
• sabrina
What is the standard procedure for calculating gel strength?
3 years ago
• MUSTAFA
How to measure gel strength of drilling fulid?
3 years ago
• miikka
What role does gel strength play in drilling fluid?
3 years ago
• ulla
What role doea gel strength play in the drilling process?
3 years ago
• vanessa
What does yield point characterize in drilling?
3 years ago
• giuditta
What does plastic viscosity, yield point, and gel strength tell you?
3 years ago
• sidney
How to find gel strength?
2 years ago
• MATHILDA
What do you known about a point and two point curve fluid?
2 years ago
• jolanda
What is one point and two points curve fluids?
2 years ago
• Emmanuel Wood
What does yield point of a drilling fluid characterize.?
2 years ago
• niko
How to determine gel strength?
2 years ago
• virpi risku
How to obtain gel strength?
2 years ago
• Christina Fisher
How to measure jell strength using gelometer?
1 year ago
• michelle
What does gel strength depend on?
1 year ago
• Cruz Hunter
Why gel strength cement?
8 months ago
• biniam
How to check gels in mud rheology?
7 months ago
• andreas
How to get the initial gel strength from dial reading?
5 months ago
• Francesco
Is gel strength the viscosity at 3rpm?
3 months ago